Seat

Abstract

A seat comprising a seat pan (12) and a support structure, wherein the seat pan (12) is pivotally coupled to the support structure (8) about a first pivot axis (pi) provided across substantially the front of the seat pan (12), such that the seat pan (12) may be pivoted about the said first pivot axis (pi) in use, and the angle of the seat pan (12) relative to the support structure (18) may thus be adjusted. The seat further comprises a backrest (14), the backrest being coupled (p2) to substantially the rear of the seat pan (p2). Also provided is pneumatic apparatus for use with a seat, comprising one or more inflatable cushions for supporting a user in use. Further provided is an armrest comprising: a first pivot axis about which the armrest may be pivotally coupled to a seat, the first pivot axis being arranged to orient sideways out of the seat and thereby enable upward and downward rotation of the armrest in use; and a second pivot axis oriented parallel to the longitudinal dimension of the armrest, the armrest being rotatable about the second pivot axis in use.

Description

[0001]This invention relates to a seat. It is particularly suitable, but not necessarily limited, for use especially in aeroplanes but also in trains, buses, coaches, or other forms of passenger transport. It is also suitable for use in offices, houses, theatres, concert halls, conference centres, hotels, and other locations.BACKGROUND TO THE INVENTION[0002]There are a wide variety of individual or mass transport passenger seats providing a variety of adjustability options and configurations to suit the user's need to change the posture of his body whilst seated. Examples of such seats include airline seats, train seats, bus seats, coach seats, and so on. Such seats may be fixed to a floor, or fixed to a frame wherein the frame is fixed to a floor. Typically, such seats are configured to offer a varying degree of fit to the user's morphology, anatomy, or change of posture. Such seats' adjustability options can include seat height adjustability from floor level, seat depth adjustabil...

AI Technical Summary

Benefits of technology

[0009]Providing the first pivot axis extending across the seat pan substantially at the front edge of the seat pan provides the advantage that the user may readily change the pressure points (i.e. the parts of the user's body which bear pressure or stress) from one area of the body to another during a journey (e.g. on an aeroplane) or during some other extended period of being seated (e.g. in an office).

[0026]Preferably the armrest further comprises extending means coupled to the second pivot axis and operable to enable the end of the armrest to be extended away from the first pivot axis. This advantageously enables the length of the armrest to be adjusted to suit users of different arm lengths and anatomical proportions. Particularly preferably the extending means comprise a shaft slideable within the armrest. Other extending means are possible, such as a gas strut or a hydraulic, pneumatic or motorised assembly, for example. Preferably the armrest has a relatively small thickness compared to its width when in its in-use configuration. Preferably the armrest is profiled to conform around a user's body when in its in-use configuration. This increases the amount of usable armrest space available to the user, without encroaching on a neighbouring passenger's space.

Problems solved by technology

Both these adjustment procedures, and in particular the reclining of the backrest, can put significant pressure on the user's thighs, and may be uncomfortable.

Additionally, with a conventional fixed horizontal seat pan, tilting the backrest backwards results in the user's body being pushed forward at the hip point and the body tending to slide away from the backrest, which creates a gap at the lower part of the back in which the back is not supported (hence the need to provide supplementary cushions on long haul flights).

More generally, a user of a passenger seat (for example, an airline seat, train seat, coach seat, bus seat, or such like) may experience discomfort during a journey.

Whilst conventional reclining seats enable the user to adjust their back angle, they do not generally enable the user to change the pressure points (i.e. the parts of the user's body which bear pressure or stress) during the journey.

As a consequence, the user may risk ailments such as deep vein thrombosis, due to the being substantially immobile for a long period of time, without being able to change the pressure points.

Further problems relate to the cushions provided on conventional passenger seats.

Conventional aircraft seat cushions are usually filled with foam, which can be relatively heavy.

Foam cushions can also be relatively flammable, and may give rise to a risk of fire or smoke during a flight.

In practice, the flammability of a foam-filled airline seat is often reduced by encasing the foam cushion in a protective fire barrier, but such fire barriers are generally made of an expensive cloth.

Conventional foam cushions can also be somewhat unaccommodating for different users' body shapes and body weights; generally a foam cushion is really only suitable for a fairly narrow range of body weights and shapes.

Images